Donald Trump mixes up '9/11' with '7/11'

WASHINGTON (CNN) -- Donald Trump, who has made his advocacy for New York City after the 9/11 attacks central to his candidacy, accidentally referred to it on Monday as 7/11 -- the ubiquitous convenience store.

"I wrote this out, and it's very close to my heart," he said at the outset of his remarks on Buffalo on Monday evening. "Because I was down there and I watched our police and our firemen down at 7/11, down at the World Trade Center right after it came down. And I saw the greatest people I've ever seen in action." The businessman did not correct himself.

Trump is poised to win a lion's share of the delegates in New York's primary on Tuesday, and he has held up the city's response to the September 11, 2001 terrorist attacks as a defining "New York value."

That's the phrase used disparagingly by Ted Cruz several months ago, which Trump has tried to turn on his Republican rival.

Speaking with CNN's Ashley Banfield on "The Legal View" Tuesday about Trump's fumble, spokeswoman Katrina Pierson said, "After you've done several events over a short time period, people misspeak all of the time -- slip of the tongue."